Vulnerability in Oracle Java SE, GraalVM for JDK, and GraalVM Enterprise Edition
CVE-2026-91403

9.1CRITICAL

Key Information:

Vendor

Oracle
Status
Oracle Java Se
Oracle Graalvm For Jdk
Oracle Graalvm Enterprise Edition
Vendor
CVE Published:
21 October 2026

What is CVE-2026-91403?

This vulnerability affects multiple configurations of Oracle Java SE, GraalVM for JDK, and GraalVM Enterprise Edition. It allows unauthenticated attackers with network access to compromise these platforms via various protocols. Successful exploitation can lead to unauthorized creation, deletion, or modification of critical data. The issue can also impact Java deployments, notably those utilizing sandboxed applications, facilitating untrusted code execution. Please refer to Oracle's advisory for detailed remediation guidance.

Affected Version(s)

Oracle GraalVM Enterprise Edition 21.3.20

Oracle GraalVM for JDK 17.0.21

Oracle GraalVM for JDK 21.0.13

References

https://www.oracle.com/security-alerts/alert-cve-2026-914...
vendor-advisory

CVSS V3.1

Score:
9.1
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.